Specification:  Color: Black, Red, Green, Blue.  Bluetooth Version: BT 4.0 or above.  Compatible OS: Android 4.4 or above , iOS 8.0 or above.  Operating Mode: Touch Key.  APP Name: DaFit.  Waterproof: IP67 waterproof (Do not operate underwater).  Heart Rate Monitor: Support.  Blood Pressure Monitor: Support.  Sleep Monitor: Support.  Multi-sport Modes: Support.  Pedometer: Support.  Call or Message Reminder: Support.  Notification: Support.  Alert Type: Vibration.  Sensor: G-sensor, Heart Rate Sensor.  Screen Size:  0.96inch.  Type: TFT.  Resolution: 80*160 pixels.  Battery: Battery Capacity: 100 mAh.  Standby Time: About 5 days.  Using time: About 3 days.  Charging Time: About 2 hours.  Charging Type: USB Charging.  Material: Silicone.  Product weight: about 10g.  Band Width: about 18 mm.     Package:  1*Smart Bracelet 1*User Manual.     Tips:  1. Display and light of shoot will affect the color of the products, pictures for reference only, subject to our available products. 2. Please download the app before usage in order to compatible perfectly with your phone.